Carpet-sweeper.



G. MANTHEY; CARPET SWEEPER.

' -APPLIOATION FILED JUNE 15, 1909.

962,372, v Patented June 21,1910.

2 SHEETS-SHEET l.

Zjmnntoz MANTHEY. CARPET $WBEPER.

APPLIOATION FILED JUNE 15, 1909.

Patented June 21, 1910.

2 SHEETS-SHEET 2.

WIHIIIIJIH I anoentoz fimy flaw/26y STA KIN/FEE GEORGE MANTI-IEY, FSEATTLE, WASHINGTON, ASSIGNOR OF ONE-HALF TO JOHN N. WALLER, OF SEATTLE,WASHINGTON.

CARPET-SWEEPER.

Specification of Letters Patent.

Patented June 21, 1910.

To all whom it may concern:

Be it known that I, GEORGE MANTHEY, a citizen of the United States,residing at Seattle, in the county of King and State of \Vashington,have invented new and useful Improvements in Carpet-Sweepers, of whichthe following is a specification.

This invention relates to carpet sweepers, and has for its object toprovide novel and convenient means for adjusting the rotary sweepingbrush of a carpet sweeper to adapt the same for work on light and heavycarpets and also to lower the brush as it wears away, to render thebrush effective at all times and enable the brush to be used to the fulllimit of its efliciency or until the bristles thereof are worn almost tothe shaft or body of the sweeping roller.

WVith the above and other objects in view, the invention consists in thenovel construction, combination and arrangement of parts as herein fullydescribed, illustrated and claimed.

In the accompanying drawings :Figure 1 is a side elevation of a carpetsweeper showing the improvement applied thereto. Fig. 2 is a plan viewof the same. Fig. 3 is a vertical transverse section through the frameof the sweeper, showing the sweeping roller in elevation and the end ofthe shaft thereof broken away in section. Fig. 4 is a verticallongitudinal section through the same. Fig. 5 is a detail perspectiveview of one of the adjustable bearings.

Referring to the drawings, 1 designates the frame of a carpet sweeperwhich may be of any usual or preferred construction, size anddimensions, the same being mounted upon a pair of axles 2 which arecarried by the free ends of a pair of bowed springs 3 arranged atopposite sides of the center of the machine and adjacent to the sides ofthe frame, each of said springs being provided with a flat upper portion4 which is permanently fastened to the under side of the top section ofthe frame as best illustrated in Fig. 4, while the opposite ends thereofare curved and extended inward to form spring arms 5 at the extremitiesof which are bearings 6 for the shafts 2. The shafts 2 are capable ofmoving with the ends of the spring arms 5 by providing the side walls orportions 7 of the frame with openings 8 considerably larger than theshafts 2.

Upon the outer ends of the shafts 2 and outside of the side frame pieces7 0f the machine, there are carrying 'and driving wheels 9. Four ofthese wheels are employed, two at each side of the machine frame andsaid wheels are perferably pro vided with rubber treads or tires 10which operate in frictional and driving contact with a pair of friction.heads 11 on the opposite ends of the shaft or body 12 of a centrallyarranged rotary sweeping brush 13. The side frame pieces 7 are aperturedor slotted from their lower edges upward a suitable distance as shown at14 to allow for the up and down movement of the shaft 12 of the sweepingbrush as best shown in Figs. 3 and 4, and at each end of the sweepingbrush there is arranged a vertically adjustable bearing 15 embodying acentral pintle 16 which is received in a corresponding socket in theactual center of the sweeping brush, the bearing also comprising anannular bearing flange 17 concentric with and surrounding pintle 16 andworking in a corresponding recess in the adjacent end of the sweepingbrush shaft or body. The bear-' ings 15 are further provided withoutwardly projecting extensions or lugs 18 at the upper and lower endsthereof, the same being provided with threaded openings 19 through whichpasses an adjusting screw 20. Each of the adjusting screws 20 is fittedrotatably at its upper and lower ends in a pair of inwardly extendingears 21 on upwardly and downwardly extending arms 22 and 23 on a sideyoke 24. The yokes 24 extend lengthwise of the frame and have theiropposite ends extended inward as shown at 25 and secured to the frontand rear of the frame of the sweeper as shown in Fig. 2. Each of thescrews 20 is also provided at its upper end with a head 26.

From the foregoing descriptlon, it will be understood that by means ofthe adjusting screws 20, the sweeping brush may be adjusted up and downto correspond with the thickness and nature of the carpet being operatedupon, also that the brush may be adjusted downward as the same wearsaway, thereby enabling the bristles of the brush to be utilized to thefull extent and avoiding the necessity of frequent renewal of thesweeping brush. No matter what the position or adjustment of thesweeping brush may be, the spring arms 5 hold the carrying and tractionwheels of the machine in close and frictional driving contact with thefriction heads 11 of the sweeping brush, thereby insuring the effectiveoperation of the machine at all times.

I claim l. A carpet sweeper embodying a machine frame, side yokesconnected to the machine frame, adjusting screws journaled at or nearboth ends in spaced bearing lugs on said yokes, a rotary sweeping brush,and bearings at opposite ends of said brush having extensions threadedon the adjusting screws and movable between the bearing lugs on theyokes, whereby the brush may be adjusted up and down on the adjustingscrews relatively to the machine frame by turning said screws.

2. A carpet sweeper comprising a machine frame, carrying wheelstherefor, side yokes arranged at opposite sides of the machine frame andconnected therewith, a vertically movable sweeping brush, adjustingscrews GEORGE MANTHEY.

Witnesses:

W. F. ULRIcH, C. R. BEDDING.

